From 3f2ccb9b9acb30834cb7759d14b57f884ea03981 Mon Sep 17 00:00:00 2001
From: weru <fromweru@gmail.com>
Date: Thu, 06 May 2021 21:57:29 +0000
Subject: [PATCH] add helper

---
 assets/js/index.js |   18 ++++++++++++++++++
 1 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/assets/js/index.js b/assets/js/index.js
index 3f99ba5..41c526a 100644
--- a/assets/js/index.js
+++ b/assets/js/index.js
@@ -363,6 +363,24 @@
     toggleMenu(event);
   });
 
+  (function backToTop(){
+    const toTop = elem("#toTop");
+    window.addEventListener("scroll", function(e) {
+      const lastKnownScrollPosition = window.scrollY;
+      if(lastKnownScrollPosition >= 200) {
+        toTop.style.display = "flex";
+        const viewPort = window.innerWidth;
+        const maxBodyWidth = 1240;
+        // if(viewPort > maxBodyWidth) {
+        //   toTop.style.right = `${((viewPort - maxBodyWidth) / 2)}px`;
+        // }
+        pushClass(toTop, active);
+      } else {
+        deleteClass(toTop, active);
+      }
+    })
+  })();
+
 }
 
 window.addEventListener('load', loadActions());

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